JPH0567538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for conveying a plate-shaped object such as a plate glass.

(Prior art) When continuously conveying plate-shaped objects such as plate glass,
A device shown in FIG. 4 has been conventionally used as a device for changing the interval between the plate-shaped bodies by changing the conveyance speed midway through the conveyance.

The device shown in FIG. 4 is used for conveying plate glass, and its configuration is such that a large number of free rollers 101 are attached to the surface of a chain belt 100, and the conveying roller is arranged on the upstream side so that the running speed of the chain belt 100 is adjusted. 102..., and the plate glass 104... separated from the ribbon-shaped glass band 103 is separated and conveyed. That is, when the glass band 103 is pulled out for a predetermined length from the conveyance roller 102, the arrow 1
Plate glass 10 cut at the point indicated by 05
4 is conveyed by a chain belt 100,
In particular, since free rollers 101 are attached to the surface of the chain belt 100, the glass belt 1
03, the free roller 101 idles and the glass band 10
3. Avoid scratches on the bottom surface.

(Problems to be Solved by the Invention) According to the above-mentioned conveying device, since the chain belt does not come into direct contact with the lower surface of the glass band, scratches can be prevented to some extent, but the free rollers 101 attached to the chain belt... There are many free rollers 101, and each of these many free rollers 101 has a different frictional resistance. As a result, the lower surface of the glass strip 103 is scratched due to poor rotation of the free roller, and the glass plates 104 being conveyed are tilted due to individual differences in frictional resistance, resulting in irregular rows. The above-mentioned disadvantages are particularly noticeable when transporting thin glass sheets. Furthermore, although the plate glass 104 may be cut in advance in order to cut it in the longitudinal direction, vibrations caused when the glass plate 104 is conveyed on the free rollers may cause the cut lines to be cut in the longitudinal direction before the sheet glass 104 is conveyed to the place where the longitudinal cutting is to be performed. It may crack along the cut line.

Furthermore, when conveying not only plate glass but also plate-shaped objects using the above-mentioned apparatus, there are cases in which it is desired to convey several plate-shaped objects close together to form a group, but with the above-mentioned conventional apparatus, it is difficult to convey individual plate-shaped objects. Since the rotation of the free roller cannot be controlled, such conveyance cannot be achieved.

Furthermore, the above-mentioned problem is that the chain belt 100
In the case where the traveling speed of the conveyance roller is made lower than the rotational speed of the upstream conveyance roller, and the intervals between the plurality of plate-like bodies that are continuously conveyed on the conveyance roller can be sandwiched when conveyed on the chain belt 100, occurs similarly.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a transport device with a low transport speed, a transport device with a high transport speed, and a transport device disposed between these transport devices. , a group of intermediate rollers connected to both a drive shaft that rotates at a low speed and a drive shaft that rotates at a high speed through a clutch mechanism, at least one of the clutch mechanisms being an induction clutch, and an exciting current flowing through the coil of an electromagnet. By adjusting the torque, the magnitude of the torque is changed, and the torque of the entire induction clutch is controlled in accordance with the load coil due to the weight of the plate-shaped body. Further, at least one of the clutch mechanisms is an induction clutch.

(Example) Examples of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a plan view of a conveying device according to the present invention, and the conveying device 1 is composed of an upstream conveying device 20, a downstream conveying device 30, and an intermediate roller group 40 disposed between these conveying devices 20, 30. , the upstream conveyance device 20 has a large number of drum-shaped rollers 21 . It is placed in a higher position. One end of these rollers 21 is supported by a bearing 22, and the other end is connected via a gear to a drive shaft 2 that rotates at a low speed and is arranged along the conveyance direction.

Similarly to the upstream conveying device 20, the downstream conveying device 30 also has a large number of drum-shaped rollers 31 arranged in parallel so that their axes are perpendicular to the conveying direction, and one end of these rollers 31 is supported by a bearing 32. The other end is connected via a gear to a high-speed rotating drive shaft 3 disposed on the opposite side of the low-speed drive shaft 2.
The rear end of the drive shaft 2 extends to the downstream end of the intermediate roller group 40, and the tip end of the drive shaft 3 extends to the upstream end of the intermediate roller group 40.

On the other hand, the intermediate roller group 40 consists of a large number of rollers 41a...41h whose axes are perpendicular to the conveying direction,
These rollers 41a...41h are formed by fitting a ring member 43 made of rubber or the like into a predetermined position of a rod-shaped shaft 42, and one end of the shaft 41a rotates at a low speed via bevel gears 4 and 5 as shown in FIG. Connected to the drive shaft 2,
The other end of the shaft 42 is connected to the drive shaft 3, which rotates at high speed, via a bevel gear similar to that described above. Also, the shaft 42
are provided with clutch mechanisms 6 and 7, and the clutch mechanism 6
Intermediate roller 41a...41h low speed drive shaft 2
The clutch mechanism 7 turns on and off the connection between the intermediate rollers 41a...41h and the high-speed drive shaft 3.

As the clutch mechanism 6, for example, an ordinary overrunning clutch is used, and as the clutch mechanism 7, an induction clutch is used. This induction clutch consists of an anchor ring and a boss part, and a built-in electromagnet is rotatably arranged on the outer periphery of the boss part via a ball bearing. The structure consists of forming poles and inserting a copper rod between the poles, and its operating principle is as shown in Figure 3.
When a direct current is passed through the coil of electromagnet 8, the electromagnet 8
If a magnetic flux is generated between the anchor ring 9 and the anchor ring 9, and the anchor ring 9 and the electromagnet 8 are rotating at different speeds, the electromagnet 8 and the anchor ring 9 will rotate in sequence as shown in FIG. 3A, B, and C. Their mutual position changes and the magnetic flux changes. Due to the change in magnetic flux, a voltage is induced in the copper rod inserted between the anchoring poles 10, and since the copper rod is connected to the short-circuit ring, a current flows within it, and this current and magnetic field Due to this action, a force acts on the electromagnet side, and this becomes the dynamic torque of the clutch. On the other hand, if the anchor ring 9 and the electromagnet 8 are rotating at the same rotation speed, the magnetic circuit always tries to occupy the position where the magnetic flux is at its highest value, so the anchor ring 9 and the electromagnet 8 are It tries to stay in the indicated position, and if it deviates, a force is applied to return it to its original position, and this becomes the static torque of the clutch. The magnitude of the torque can be freely changed by adjusting the excitation current flowing through the electromagnet coil. Therefore, the induction clutch 7 is turned on, and the intermediate roller 41a...
When rotating 41b at high speed, the rotational speed of intermediate rollers 41a...41b gradually increases,
When the induction clutch 7 is turned off, the rotational speed of the intermediate roller 41 gradually decreases.

A method of transporting sheet glass using the transporting device configured as described above will be described below.

First, the band-shaped glass ribbon 50 is conveyed over the roller group 20 on the upstream side, and the breaking roller 21
a, a part of which has been carried over the intermediate roller group 40, that is, immediately before the state shown in FIG. 1, the intermediate rollers 41a, 41b, 41
The clutches 6 of c, 41d, 41e are turned on, the clutches 7 are turned off, and the intermediate rollers 41f, 41g, 4
1h, the clutch 6 is turned off, the clutch 7 is turned on, the intermediate rollers 41a...41e are set to a low conveying speed equal to the conveying speed by the upstream conveying device 20, and the intermediate rollers 41f...41h are set to a low conveying speed equal to the conveying speed by the downstream conveying device 30. The transport speed is a high transport speed that is equal to the transport speed.

When the glass ribbon 50 is carried a predetermined length onto the intermediate roller group 40 from this state, the weight of the carried part is applied to the part lifted by the breaking roller 21a, and the glass ribbon 50 is moved in the width direction. The sheet glass 51 is cut along the cut lines. This state is shown in FIG. here,
The intermediate rollers 41a...41e are the upstream conveyance device 2.
Since the transport speed is set equal to 0, the glass ribbon 50 is carried onto the intermediate roller group 40 without slipping.

When the state shown in FIG. 1 is reached, the clutches 6 of the intermediate rollers 41a...41e are turned off, and the clutches 7 are turned on. Then, since the clutch 7 uses an induction clutch as described above, the rotation speed gradually increases, and eventually the drive shaft 3
The intermediate roller 41a reaches a high rotational speed due to
. . . 41h are all equal to the conveying speed of the downstream conveying device 30. Therefore, the plate glass 51 gradually increases its speed while being conveyed by the intermediate rollers 41a...41e without slipping, and finally reaches a speed equal to the conveying speed by the downstream conveying device 30, and is transferred onto the downstream conveying device 30. will be carried out.

On the other hand, regarding the intermediate rollers 41a...41e,
As soon as the plate glass 51 passes, the clutch 7
is turned off and clutch 6 is turned on to return to low speed rotation and prepare for the next conveyance. To detect the passage of the glass, a detector may be provided for each intermediate roll 41a...41f, but a glass edge detector may be provided immediately after the breaking roller to detect the passing of the glass. induction clutch
It's easy to control SP. By sequentially cutting and conveying the glass plates 51 in this manner, the glass plates 51 are continuously conveyed with a predetermined interval formed between the preceding glass plate 51 and the following glass plate 51, and any No slips will occur at any point.

By the way, in the above embodiment, the intermediate roller 4
For 1f...41h, the clutch 6 was always turned off and the clutch 7 was turned on, but the intermediate roller 41a
. . . How much of the 41h should be kept constantly rotating at high speed is appropriately selected depending on the length of the plate glass 51 to be conveyed.

Incidentally, in the above embodiment, the upstream conveyance device 20 and the downstream conveyance device 30 were constituted by drum-shaped rollers 21 . . . 31 .
...In place of 31, a conveyor belt, ring roller, etc. may be used.

Further, in the embodiment, an example was shown in which the glass ribbon 50 is cut into plate glass 51 and the glass 51 is conveyed in a continuous spaced manner, but this apparatus is not limited to plate glass, and is capable of conveying various plate-like objects. Therefore, it is also possible to transport the plate-shaped bodies cut from the beginning or pre-formed into plate-shaped bodies to the downstream side so as to narrow the interval between them in the intermediate roller group. In this case, it is preferable that the upstream conveying device has a high conveying speed, the downstream conveying device has a low conveying speed, and the clutch 6 is an induction clutch. Further, it is also possible to transport a group of a predetermined number of plate-like objects.

Furthermore, when separating and transporting a plate-like object, the torque of the entire induction clutch is adjusted to match the load torque due to the weight of the plate-like object, without controlling the magnetization and demagnetization timing of each individual induction clutch. The speed may be controlled to be low depending on the load on the plate-like body until the plate-like body is separated, and after the plate-like body is separated, the speed may be increased as the load is reduced.

(Effects of the Invention) As explained above, according to the present invention, at least one of the clutch mechanisms is an induction clutch, and the magnitude of the torque is changed by adjusting the excitation current flowing through the coil of the electromagnet.
By controlling the torque of the entire induction clutch in accordance with the load torque due to the weight of the plate-shaped body, it is possible to gradually change the rotational speed of the rollers constituting the intermediate roller group.
It is possible to reliably prevent the occurrence of scratches and the like without slipping on heavy or light glass. Furthermore, since vibrations can be suppressed, bending, irregularity, and even cracking of the plate-shaped body can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conveying device according to the present invention, and FIG.
The figure is a partially enlarged view of the same device, FIGS. 3A to 3C are principle diagrams of an induction clutch used in a part of the same device, and FIG. 4 is a side view of a conventional conveying device. In the drawing, 1 is a conveyance device, 2 is a drive shaft that rotates at low speed, 3 is a drive shaft that rotates at high speed, 6 and 7 are clutches, 20 is an upstream conveyance device, 30 is a downstream conveyance device, and 40 is an intermediate Roller group, 41a, 41b,
41c, 41d, 41e, 41f, 41g, 41
h is a roller constituting the intermediate roller group, and 51 is a plate-shaped body.

Claims (1)

[Claims] 1. A conveyance device with a low conveyance speed, a conveyance device with a high conveyance speed, and a clutch mechanism that is installed between these conveyance devices and connects both the low-speed rotating drive shaft and the high-speed rotating drive shaft. At least one of the clutch mechanisms is an induction clutch, and the magnitude of the torque is changed by adjusting the excitation current flowing through the electromagnetic coil, and the load due to the weight of the plate-shaped body is changed. A conveying device for a plate-like object, characterized in that the torque of the entire induction clutch is controlled in accordance with the torque.